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1) A copper wire is 1.7 mm in diameter and carries a current of 20 A. What is the electric field strength inside this wire?

1) A copper wire is 1.7 mm in diameter and carries a current of 20 A. What is the electric field strength inside this wire? 2) The 120 V electric heater in a coffee maker has a resistance of 13 . How long will it take for this heater to raise 8 cups (1760 g ) of water from 20 C to the ideal brewing temperature of 90 C

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